Guest Stars Toheeb Jimoh as Marcus Pete MacHale as Leon Ursula Holliday as Cass Stewart Anneika Rose as Natalie Sheila Atim as Amanda Javad Olivia Morgan as Tia Anna Koval as Gwen Ashe Michael Wildman as ICSA Agent Ryan Wasim Zakir as Naz Bhavik C. Pankhania as ICSA Officer Aoife Hinds as Lyla Nancy as Scarlett Brookes Jodie Tyack as Laura Michael Golab as ICSA Guard Luke Hornsby as Derrick (Resister 1) Brooke Haynes as Little Girl Carl Prekopp as Inmate Rayna Campbell as ICSA Agent 2 / Female Guard Heather Bleasdale as Nurse Mary Alexander Hanson as James Parslow Mark Burgess as Mr Barker